Motor driven hair cutting implement



Jul 26, 1938.

B. R. NY HAGEN MOTOR DRIVEN HAIR CUTTING IMPLEMENT Filed July 14. 1936 v I INVENTOK 50/726} 4. flylza en ATTORNEY .5

Patented July 26, 19318 antes arrests Moron nurvnu a cnrrrne i murmur may R. lrlyhagen, Brena, N. W.

application lluly is, root, serial no. cases onion; (oi, as)

This invention relates to motor driven razors or hair cutting implements and broadly compreedges of the teeth of the cutter elements, while the movable element also acts to massage the skin during the shaving operation.

More particularly the invention resides in a device of the indicated characterwhich includes fixed and movable cutter elements each having teeth provided with cooperative cutting edges between which the hair to be cut is adapted to be engaged, the movable cutter element being so arranged as to contact with the skin in order to agitate and massage the same while functioning to raise the hair to a position perpendicular to the plane of the skin so as to properly guide and present the same to the cooperative cutting edges of the teeth and thereby insure a close within the scope oi? the invention' and uniform severing of the hair without the necessity of employing shaving soaps or creams.

As a further feature, the invention provides in a device of the indicated character, a movable cutter element in which the toothed portion thereof is resiliently mounted and tensioned so as to pull and maintain the teeth thereof into frictional contact with. the teeth of the fired cutter element.

The invention is also directed to an improvement in the holder and actuator member for the cutter unit which resides in the provision of an eccentric or crank pin removably associated with the motor shaft terminal whereby said pin may be periodically replaced when worn to insure proper functioning oi the device.

With the above enumerated and other objects in view, reference is now made to the following specification and the accompanying drawing in which there is disclosed, by way of example, a single embodiment of the invention, while the claims cover variations and modifications falling In the drawing:

Fig. l is a side view of a. motor driven, razor constructed in accordance with the invention and partially broken away to disclose the under-'- lying structure.

Fig. 2 is a fragmentary enlarged sectional view therethrough taken approximately on the line 2-2 of'Fig. 3.

Fig.- 3 is a. fragmentary enlarged plan view with parts broken away and shown in section.

Fig. i is an enlarged transverse sectional view taken approximately on the line of Fig. 3.

Fig. '5 is an enlarged perspective view of the movable cutter element of the cutter unit" Referring to the drawing by characters of reference, A designates generally the cutter unit and B the holder member therefor which member consists of a hollow handle constituting a housing for a motor it diagrammatically illustrated in the present instance as an electrical mo tor and having a shaft it, one terminal of which extends into the groove it; formed at one end of the handle. An element having an eccentric or crank pin it is carried by said shaft terminal and as illustrated; said element is removaioly associated therewith by threaded engagement with the same so that the said element may be periodically replaced when the crank pin is worn to insure proper functioning of the cutter unit.

' The cutter unit A consists of a fixed cutter element iii and a movable cutter element it.

The fixed cutter element i5 is of generally rectangular shape and the lower portion thereof is designed to snugly fit within the groove it of theend of the handle member B and is removably retained in place by means of a setscrew it having a knurled manipulating head it, the inner terminal of said screw engaging within a keeper depression it in one at the longitudinal side faces of the fixed cutter element.

The fixed cutter element is formed. with a longitudinally extending circularbore M with which a longitudinal slot ti communicates, which slot 2i opens through the upper surface of the fixed cutter element. The outer sides of the fixed cutter element iii adjacent the slot are provided with longitudinally extending grooves or concavities 22 and the upper portion of the slot 28 is flared. laterally outward to provide laterally and upwardly divergent surfaces 23. The

upper portion of the fixed cutter element it is then provided with a surface of transverse parallel grooves defining-teeth it. A centrally arranged vertical opening it is formed in the lower portion of the fixed cutter-element i5 and extends from the here to downwardly through the lower surface of the fixed cutter element to receive therethroughuthe upper terminal of the shaft i2 and the eccentric pin it;

The movable cutter element it consists of a substantially cylindrical base rod 2% of a diameter to snugly ht within the bore (it of the fixed cutter element to andof a length approximately the length of said bore. The upper portion of said base rod it is provided with a fiat longitudinally extending face 27 and a cutter bar 28 is yieldably connected with the base rod 26 in superposed relation to the flattened upper surface 21.

As illustrated, the upper portion of the cutter bar 28 is formed with laterally projecting flanges 29, the undersurfaces of. which are inclined laterally andupwardiy to coincide with the laterally and upwardly divergent surfaces 23 of the fixed cutter element while the upper surface is formed with transverse parallel grooves 38 corresponding to the grooves of the fixed cutter element and defining on the flanges 29 teeth N which cooperate with the teeth 2d of the fixed cutter element to sever the hair when the movable cutter element i6 is reciprocated with rei- I erence to the fixed cutter element B5.

The base rod 26 of the movable cutter element is provided with a transverse notch 52 intermediate its ends and in the lower portion thereof to receive the eccentric or crank pin it; whereby upon rotation of the motor shaft i2 reciprocation is imparted to the movable cutter element to. rod 26 and the cutter bar Et 'consists of a pair of studs 33 threadedly engaged in the cutter has 28 adjacent the opposite ends thereof and extending downwardly therefrom through ape! tures into recesses 3% in the case rod where coiled expansion springs surround the studs and are interposed between the sorted heads thereof and the inner or upper ends the recesses 35 so that a tension is exerted to normally pull the lower surface of the cutter bar into fiat contact with the surface of the base rod (lloviowiy, when the movable cutter element is positioned in the tired cutter element to, the tension thus exerted by the springs will draw and. maintain. the inclined lower surfaces of the flanges the teeth til formed thereon into contact with the divergent upper surfaces of the teeth 26- to insure a proper contact thereof and a definite shearing action of the edges oi the manipulating teeth 26 and El.

In use and operation it will be apparent that the grooved upper surface of the movable cutter element iG being exposed when shaving will contact with the skin in order to definitely agitate and massage the same to promote circulation coincident with the shaving operation. Liliawise, the movement of the said movable cutter element while in contact with the slain will cause the moving teeth to raise the hair to a position perpendicular to theplane of the Skin and thereby properly guide and present the same to the co-acting cutting edges of the teeth thus insuring a close and uniform severing of the hair without employing shaving soaps and creams and without irritating the slain.

Whatis claimed is:

1. In a power driven hair cutting implement, "a holder and actuating member and a cutter unit carried thereby including cooperative cut ter elements relatively fined and movable with reference to said holder and actuating member, the fixed cutter element having a longitudinally extending bore and a longitudinally extending slot communicating with said bore and opening through the upper end of said fixed cutter ele- The yieldable connection between the lease ment with laterally and upwardly divergent upper surfaces on opposite sides of said slot, the upper end of said fixed element having longitudinally spaced transverse grooves, the movable cutter element comprising a base slidably fitted within the bore and a cutter bar fitted within said slot and provided with lateral flanges having upwardly inclined under surfaces and formed with longitudinally spaced transverse grooves, and resilient means for drawing said under surfaces of the flanges into contact with the upper surfaces of the fixed cutter element.

2. A shaving device comprising a toothed stationary cutter member having a recess therein, and a toothed movable cutter member reciprocably mounted in said recess and having substantially its teeth only overlying the teeth of said stationary cutter member, the underside of the teeth of said movable member engaging against the outer surface of the teeth of said stationary member and the outer surface of the teeth of said movable cutter being adapted to directly engage the slain, the teeth of said stationary cutter member being integral therewith and the outer surface of said movable member being whollyfree oi overlying portions of said shaving device whereby all of said outer surface is directly engageahle with the skin.

3. A shaving device comprising a fixed her having a plurality of integral spaced teeth. A

of thin spaced teeth reciprocable over in engagement with the outside surfaces of first named teeth, said movable cutter member having substantially its teeth only overlying the teeth; of said fixed member, the spaces between said last named teeth being open at one end to permit hair in saidfirst spaces to enter between the second named teeth to be cut as said cutter member moves, and the outer surface of said movable member being wholly free of overlying portions of such shaving device whereby all oi said outer surface is directly engageable with the skin.

a. A shaving device comprising a fixed block provided with a channel. groove extending longitudinally therein, the upper surface of said block on each side of said groove being formed with spaced teeth, a reciprocable cutter block in said channel groove having a thin toothed portion overlying and engaging the upper toothed sur faces of said fixed block, and means tor recipro- 

